package com.cyn.controller.test;

public class Java8Tester {
    public static void main(String args[]) {
//        Java8Tester tester = new Java8Tester();
//        // 类型声明
//        MathOperation addition = (int a, int b) -> {
//            return a + b;
//        };
//        // 不用类型声明
//        MathOperation subtraction = (a, b) -> a - b;
//        // 大括号中的返回语句
//        MathOperation multiplication = (int a, int b) -> {
//            return a * b;
//        };
//        // 没有大括号及返回语句
//        MathOperation division = (int a, int b) -> a / b;
//        System.out.println("10 + 5 = " + tester.operate(10, 5, addition));
//        System.out.println("10 - 5 = " + tester.operate(10, 5, subtraction));
//        System.out.println("10 x 5 = " + tester.operate(10, 5, multiplication));
//        System.out.println("10 / 5 = " + tester.operate(10, 5, division));
//        // 不用括号
//        GreetingService greetService1 = message ->
//                System.out.println("Hello " + message);
//        // 用括号
//        GreetingService greetService2 = (message) ->
//                System.out.println("Hi " + message);
//        greetService1.sayMessage("Runoob");
//        greetService2.sayMessage("Google");
    }
    interface MathOperation {
        int operation(int a, int b);
    }
    interface GreetingService {
        void sayMessage(String message);
    }
    private int operate(int a, int b, MathOperation mathOperation) {
        return mathOperation.operation(a, b);
    }
}